test_cli: remove single-quoted cli arguments

see python/cpython#130751
this is a bug in cpython. The argument parsing behavior was changed in between two minor
releases of Python 12. In order to continue working across Python
versions, we relax the error message check.

Author: jurraca

tests/test_cli.py

@@ -83,7 +83,7 @@ def test_invalid_command(parser, capsys):
     with pytest.raises(SystemExit):
         parser.parse_args(['invalid'])
     captured = capsys.readouterr()
-    assert "invalid choice: 'invalid' (choose from 'map', 'merge', 'cov')" in captured.err
+    assert "invalid choice: 'invalid'" in captured.err
 
 def test_version_flag(parser, capsys):
     with pytest.raises(SystemExit) as excinfo: